Designed for the discriminating shooter and professional end-users, the VG6 Epsilon 556 offers muzzle control and recoil mitigation as a true combination muzzle brake/compensator/flash hider. Similar to Aero's Gamma 556, the Epsilon is compatible with 5.56mm/223 Remington only and features extended flash hiding prongs and no ports at the 12 o clock positions for an uninhibited view from flash through optics or sights. The underside of the device has six (6) valve holes providing an exit for the fastest gasses reaching the second chamber. This creates very soft low energy recoil that allows for absolute control. Made of 17-4ph heat-treated stainless steel, it has a surface hardness of 68RC. This muzzle device weighs 2.5 oz., has 1/2-28 RH threads, and a black nitride finish. It includes a crush washer.